Blue-flame burner.



H. HURWITZ & R. LEHMING.

BLUE` FLAME BURNER.

APPLIOATION FILED MAR. 2, 1907.

Patented Apr. 6, 1909.

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H. HURWITZ & R. LEHMING.

BLUE FLAME BURNER.

APPLICATION FILED MAR. 2. 1907.

Patented Apr. 6, 1909.

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MMM/wy dents of 56 Stralauerstrasse,

UNTTED STATES PATENT QFFIGE.

HERMANN HURWITZ AND RICHARD LEHMING, OF BERLIN, GERMANY; SAID LEHMING ASSIGNOR TO SAID HURWITZ.

BLUE-FLAME BURNER.

` Application led March 2, 1907.

To all whom it may concern:

Be it known that we, HERMANN HURwiTZ and RICHARD LEI-IMING, both subjects of the King of Prussia, German Emperor, and resi- Berlin, Kingdom of Prussia, German Empire, have jointly invented Improvements in Blue-Flame Burners, of which the following is an eXact specification.

Uur invention relates to a blue flame burner arrangement for lamps, burning oil or the like hydro-carbons and in particular refers to a burner where the fiame issues 'from the lateral surface of the wick only.

The object of the present invention 1s to )rovide for a regulating organ, by means of which the blue iiame formed on the sides of the wick is regulated as well as extinguished. Said object is obtained by means of a special constructed tube adapted to slide up and down on the outer wick tube of the stationary wick in combination with an air baffling cap for the conducting and baffling of incoming air to and near the burning surface of the lamp.

The regulating organ princi ally consists of a hollow tube fitted over tie outer wick tube, which at its upper end slides on the outer surface of the wick. This upper end of the regulating tube is provided with an outward projecting fiange, that is to serve as a protection for the burning flame, in as much as it catches part of the upward directed air stream and prevents a direct striking of the latter against the burning wick surface which would cause partial or complete extinguishing of the flame. The lower part of said regulating tube is also provided with outward projecting circular plates which serve the purpose of baffling the full stream of the incoming outer air current. By means of this regulating tube and the means to slide said tube up and down an easy and practical regulation and extinguishing of the flame is accomplished. ln combination with said regulating tube a special air-cap is provided. Said cap is attached to the inner wick tube by suitable means and has an outward projecting flange that rests upon the top surface of the wick tip, covering same entirely which is of considerable importance when the wick tip is arranged quite separate from the part which projects into the oil holder and which is herein referred to as the feeder I wick. This arrangement firstly prevents a Specification of Letters Patent.

Patented April o, 1909.

serial No. 360,261.

burning of the wick tip at the top, secondly by pressing upon the wick tip it insures a close contact between the separate feeder wick and the wick tip at their joint, thus causing an uninterrupted flow of the oil between the two wicks, and thirdly it effects a safe and sure extinguishing of the flame by moving the regulating tube upward, until the projecting flange on the top end of same comes in line with said fiange of the air cap resting on top of the wick tip.

ln order to make our invention better understood we accompany same by drawings in which:

Figure l. is a vertical section of the complete burner. burner with the outer parts and the regulating tube removed. Fig. 3 is a side view of the air cap and Fig. A is a side view of the complete burner arrangement with the upper part, the so-called gallery, shown in an uplifted position.

On these drawings a designates the inner and b the outer wick tube.

c is the stationary feeder wick arranged between the two wick tubes.

c are slots out into the two lower parts of the two wick tubes and the wick and positioned diametrically opposite one another.

The wick tip placed on top of the feeder wick consists of two parts, an inner layer dV and an outer mantle d, the latter being of harder material than the inner layer. On the upper part of the outer lateral surface of this wick tip mantle d the blue llame is formed.

On top of the wick tip an air cap e is placed. This cap is provided with an outwardly projecting flange r somewhere near the central portion thereof, which flange rests upon the top surface of the wick tip. The upper part of the cap e above said flange is provided with several rows of perforations e, whereas the lower part is attached to the inner wick tube by means of a bayonet-slide or by similar means. Tn attaching the air cap to the inner wick tube the flange r presses upon the wick tip, which in turn forces the lower end of the wick tip against. the top of the feeder wick and in this way accomplishes a close contact between the two wicks at their joint, so that the ascending oil can freely iiow from the one wick part to the other. The regulating tube f is arranged around the outer wick tube l) and is suitably Fig. 2 is a side elevation of the guided thereon, which may for instance be done by means of a tongued joint affixed to the regulating tube, said tongue projecting into a groove cut into the outer wick tube. A rack f is attached to the lower part of the regulating tube f. Said rack engages with the pinion t mounted on a rod t.

On or near the top of' the regulating tubef regulating tube f and the outer wick tube o and thereby revent an easy relative motion between saidD tubes, a small hole ois made in the tube f. Outside of the tube f and around the wick tip an outer burner cap 7c is arranged, which cap 7c in combination with the flange o on regulating tube f forms an air conducting and baffling device to and near the burning flame. In order to limit the lowest position of said flange o and thereby the lateral burning of the lamp, the rack f is extended to butt against the bottom of' the threaded ring f2 attached to the lowest part of the burner, whenever the lowest position of the flange c is reached.

The plates p, pf, in preventing the outer air current from becoming too strong, at the same time allow for a sufficient quantity of air to enter through the slots c cut into the lower part of the outer and inner tube a, and

b and the feeder wick c at different places. j perforated ca In the following the operating of the lamp is explained: If the burner is to be lighted the gallery m is uplifted by means of turning the handle q clockwise. Meanwhile the regulating tube f is placed at its lower position, i. e. with the rack-end f abutting against the bottoni of ring f2. Now the wick tip is lighted at its free outer surface at the sides and, after a little warming up of the burner has taken place, the gallery m is lowered and a blue burning flame appears at once. The full force of the instreaming current of fresh air is baffled by the circular plates p and p and the reduced current passh ing said plates is conducted between the outer cap 7c and the regulating tube f toward the flame, but a direct striking against the lateral burning surface of the wick tip is prevented by the rejecting flange fu. At the same time a sufllicient air current enters the slot c on the lower portion of the wick tubes and rushes through the central passage to the inside of the flame, entering into same through the perforations e of the air cap e. If the flame is to be extinguished the knob attached to the outside of the rod tis turned counter-clockwise, which raises the regulating tube The flange o at the end of said tube slides up on the sides of the burning wick part and in this way extinguishes the flame, which object is thoroughly accomplished as soon as said flange o is in line with the flange r of the air cap e.

Having thus fully described the nature of our said invention, what we desire to secure by Letters Patent of the United States, is

1. A blue flame burner for burning oils and other hydrocarbons having in combination a wick with an outside lateral burning surface, outer and inner wick holding tubes, an inner arranged on the inner wick This current of air follows the central hollow l tube, a slidablle regulating tube adapted to formed by the inner air tube a and escapes slide over said at the top through the small perforations e j of the air cap e, whence it streams into the blue flame.

Between the outer mantle d of the wick tip and the outer wick tube t there is at their place of joining a small air space i left between which serves the a creeping of the surplus oil beyond that place and between the tubes.

The outer casing of nthe lamp consists of two parts, an upper movable portion, m, the so-called gallery, and a lower stationary part m. The gallery holds the lamp cylinder and is adapted to be raised and lowered by means of a shaft n eccentrically j ournaled into the stationary casing m. This shaft is provided with a handle q and levers n aflixed thereto. The latter hinge into links n2 whose upper ends are pivoted to rails s jguided in sockets s2. These sockets are rmly attached to the stationary lower casing m.

purpose of preventing l lateral burning surface of the wick, a baffle flange at the up er end of said regulating tube and an outer urner cap extending as a hood over the end and exposed part of said wick and surrounding said slidable regulating tube.

2. In a blue burner for burning oils and the like hydrocarbons having an outside lateral burning surface the combination of a burner cap lr arranged around the wick tip with a flame regulating tube f fitted on the outer wick tube and adapted to slide u and down thereon, said regulating tube Ilbeing provided with an outwardly projecting flange v at air baffling plates p, p near its bottom, substantially as described and for the purpose set forth.

3. In a blue burner for burning oils and the like hydrocarbons havinCr an outside lateral burning surface the combination comprising a burner cap 7c arranged around the wick tip, a flame regulating tube f fitted on its upper end and with circular IOO the outer wick tube and adapted to slide up and down thereon, an outwardly projecting flange o attached to the upper end of the regulating tube, circular air baffling plates p, p connected to the lower part of the regulating tube and a perforated air cap e having an outwardly rojecting VHange r attached near the centra? portion thereof said flange resting upon the top surface of the wick tip and covering same, substantially as described and for the purpose set forth.

Ll. ln a blue burner for burning oils and the like hydrocarbons having an outside lateral burning surface, the combination providing for conducting of air to the inner and outer part of the flame, comprising an outer and inner wick tube with a stationary feeder wick between, the hollow of said inner wick tube forming a central air passage, said wick tubes and inclosed wick being rovided with longitudinal openings at the ower portion thereof to allow for an entering of outside air to the said central air passage, a perforated air cap e disposed on the top end of said centrai airpassage and having an outwardly projecting flange r attached near the central portion thereof, said flange resting upon the top surface of the wick tip, means for detachably fastening said cap to the inner wick tube, a flame regulating tube f fitted on the outer wick tube and adapted to slide up and down thereon, said regulating tube having circular air baffling plates p, p disposed near its lower part and a flange o attached to its upper end, and a burner cap k arranged around the wick tip substantially as dee scribed and for the purpose set forth.

5. In a blue burner for burning oils and the like hydrocarbons the combination comprising a stationary feeder wick, an outer and inner wick tube holding the upper portion of said feeder wick said tubes and inclosed wick having slots formed therein for the passage of air to the central wick tube a separate wick tip disposed on top of the feeder wick and consisting of an outer and inner layer, the outer layer having the lateral burning surfaces on the outside, a burner cap k arranged around the wick tip, a flame regulating tube f fitted on the outer wick tube and adapted to slide up and down thereon, an outwardly projecting flange e attached to the upper end of the regulating tube, circular air bafiiing plates p, p connected to the lower part of the regulating tube, means for moving said regulating tube and means for limiting the lowest position thereof, a perforated air cap e having an outwardly projecting flange r attached near the center portion thereof, said flange resting upon the top surface of the wick tip and covering same, and means for attaching said burner cap to the inner wick tube.

6. In a blue burner for burning oils and the like hydrocarbons the combination comprising a stationary feeder wick, an outer and inner wick tube holding the upper portion of said feeder wick said tubes and inclosed wick having slots formed therein for the passage of air to the central wick tube, a separate wick tip disposed on top of the feeder wick and consisting of an outer and inner layer, the outer layer having the lateral burning surfaces on the outside, a burner cap c arranged around the wick tip, a flame regulating tube f fitted on the outer wick tube and adapted to slide up and down thereon, an outwardly projecting flange e attached to the upper end of the regulating tube, circular air baffling plates p, p connected to the lower part of the regulating tube, means for moving said regulating tube and means for limiting the lowest position thereof, a perforated air cap e having an outwardly projecting flange resting upon the top surface of the wick tip and covering same, means for attaching said air cap to the inner wick tube, a gallery m. adapted to be raised and lowered and. means to accomplish the moving of said gallery, substantially as described and for the purpose set forth.

7. A blue flame burner for burning oil and other hydrocarbons having in combination an outer and inner wick tube, a suction wick between said tubes, a separate wick tip at the upper end of said suction wick and between said tubes, an inner perforated cap at the upper end of said inner wick tube, a flange on said cap resting on the upper edge of said wick tip, a slidable regulating tube ntf-ed over the outer wick tube, a baffling flange on said regulating tube at its upper end, for the purpose set forth.

In witness whereof we have hereunto set our hands in the presence of two witnesses.

HERMANN HURWITZ. RICHARD LEHMNG.

Witnesses WOLDEMAR HAUPT, HENRY HAsrEn. 

